Utility Pole Rope Arrest-and-Release Device with Cam Block
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Solution Overview
Problem
The installation of power lines on utility poles is hazardous due to the need for manual handling of pulling ropes, which poses risks to personnel and property, and existing rope arrest-and-release devices are not specifically designed for utility poles or do not offer the necessary structural features for efficient operation.
Innovation Solution
A rope arrest-and-release device with a housing featuring vertical and horizontal rollers, a cam block assembly, and a pole interface with spikes, allowing the rope to be secured and released from utility poles while maintaining the rope above ground level, enabling horizontal and vertical movement, and incorporating a ratchet mechanism for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual handling of pulling ropes is used to string power lines through pulleys on utility poles, then the rope can be installed, but safety hazards to personnel and property increase
Solution Approach 1:
The patent introduces an intermediary device (the rope arrest-and-release device with ground-based handling mechanism) that mediates between the ground crew and the rope installation process. This allows ground personnel to control rope deployment without climbing poles, eliminating the direct safety hazard while maintaining installation capability
Solution Approach 2:
The patent replaces the manual climbing and physical rope-pushing mechanism with a mechanical device that uses rollers, cam blocks, and release mechanisms. This substitution automates the rope handling process, reducing human exposure to hazardous conditions while maintaining installation effectiveness
2Object-affected harmful factors
If helicopters are used to string pulling rope through pulleys, then safety hazards are reduced, but cost and practicality worsen
Solution Approach 1:
The device enables ground-based self-service installation where operators can handle the rope from ground level using the built-in rollers and release mechanisms, eliminating the need for expensive helicopter assistance while maintaining safety and installation capability
Solution Approach 2:
The patent changes the operational parameters from aerial helicopter deployment to ground-level mechanical handling. This parameter change makes the system adaptable to typical utility pole installation scenarios without requiring specialized aerial equipment, improving cost-effectiveness and practicality
3Object-affected harmful factors
If rope is maintained above ground during installation, then property damage is minimized, but operational complexity increases
Solution Approach 1:
The device segments the rope handling function into distinct components: ground-level release mechanism, vertical guidance through rollers, and controlled deployment. This segmentation allows the rope to be maintained above ground through structured mechanical guidance rather than complex operational procedures
Solution Approach 2:
The patent employs dynamic elements including rotatable rollers, movable cam blocks, and spring-loaded release mechanisms that automatically adapt to rope tension and position. These dynamic features maintain the rope above ground through automatic mechanical response rather than complex manual control procedures
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device significantly reduces safety hazards and increases operational efficiency by allowing rope handling from the ground, minimizing property damage, and enabling efficient stringing of power lines in either direction, thus improving safety and reducing operational risks.
Implementation Method 1
a spring, the cam being configured rotate upward when the spring is relaxed and downward when the spring is compressed
Implementation Method 2
The cam block assembly comprises a cam block, a cam, and a spring, the cam being configured rotate upward when the spring is relaxed
Data Source
AI summary
A rope arrest-and-release device comprising a cam block assembly and a housing with front vertical rollers situated on either side of the housing, rear vertical rollers situated directly behind the front vertical rollers, and a pair of horizontal rollers situated to the interior of the front and rear vertical rollers on either side of the housing. The cam block assembly includes a cam block and a cam that rotates upward and downward via a spring. Each front vertical roller is configured to rotate forward to allow a rope to be inserted between the cam and the inside ceiling of the housing. The cam block assembly fits into an internal recess in the housing and is removable and reversible. The invention include a means for securing the device to a utility pole and for locking the cam in a downward (open) position.